ACMP ©2006-2008 UAF Geophysical Institute A-1 Water, Water Everywhere

Water, Water Everywhere

Overview:Students explore the location of water on Earth using a terrarium to model the water cycle. (NOTE: This lesson requires two separate days.)

Objectives:The student will:• identifythevariouslocationsofwateronEarth;and• explainthatwaterexistsinvariousforms.

Materials:• Wide-mouthglassjar• Smallrocks• Sand• Soil• Smallplant• Plasticwrap• Globe• 1galloncontainer• Water• 2beakers• Smallmirror,orplasticbagandtape,see“CriticalThinkingQuestion”(oneperstudent)• OVERHEADS:“WateronEarth”and“SolidandLiquid”• STUDENTINFORMATIONSHEET:“ModelEarth”• STUDENTWORKSHEET:“Water,WaterEverywhere”

Activity Preparation: Build amodel terrarium, as outlined in theSTUDENT INFORMATION

SHEET:“ModelEarth”toshowtheclassasanexample.

Activity Procedure:

Day11. Displayaglobe.Askstudentswhataglobeisandwhatitshows.Ifneces-

sary,explainthattheglobeisamodelofEarth.PointtoAlaskaontheglobe,andexplainthatbluerepresentswater(oceans,lakes,etc.)andtheothercolorsrepresentland.

2. AskstudentshowmuchofEarth’ssurfaceiscoveredinwater.Explainthatmost(two-thirds)ofEarthis covered with water.

3. Tellstudentsthatstuff(matter)onEarthisfoundinbothsolidandliquidform.Showstudentsexam-plesofsolidsandliquidsintheclassroom.Makesurestudentsknowasolidissomethingthatkeepsitsshape,andaliquidissomethingthattakestheshapeofthecontaineritisin.Brainstormwordsthatdescribesolidsandliquids.

4. ShowOVERHEAD:“SolidandLiquid.”Pointoutthecupofwaterandtellstudentsthatitisaliquid.Pointouttheicecubeandtellstudentsthatitisasolid.Askstudentshowwaterturnsintoice.

5. TellstudentsmostofEarth’swaterisintheoceans.Showstudentsagalloncontainerfilledwithwater.Pour1/8cupsofwaterintoabeakerand1/3cupofwaterintoasecondbeaker.ExplainifthegalloncontainerrepresentedallthewateronEarth,thebeakerwith1/3cupshowsalltheice,andthebea-

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Level

Grades K-2

ACMP ©2006-2008 UAF Geophysical Institute A-2 Water, Water Everywhere

kerwith1/8cupshowsallthefreshwater.Thewaterleft inthegalloncontainerisallthewaterinEarth’soceans.

6. Askstudentsiftheycandrinkthewaterfromtheoceans.Explainthatthewaterintheoceanscon-tainssalt,andisnotdrinkablebypeople.Explainthatonly1%ofEarth’swaterisusablebypeople(theamountrepresentedbythe1/8cupofwaterinthebeaker).

7. Askstudentswhere liquidwatercanbe foundonEarth(lakes, rivers, oceans, etc.).AskstudentswheresolidwatercanbefoundonEarth(glaciers, sea ice, ice caps, etc.).Liststudentideasontheboard.Ifnecessary,explainthatliquidwaterisfoundinlakes,rivers,andoceans;andsolidwaterisfound in ice from glaciers, sea ice, and ice caps.

8. Displaythe“Earth’sWater”sectionof theGlobal Climate InteractiveDVD.Asaclass,explorethesectionsthatareappropriatetothelevelofknowledgeintheclass.

9. Inform students that they are going to build a terrarium as a model of Earth. Show students the class examplethatwascreatedduringtheActivityPreparation.DistributetheSTUDENTINFORMATIONSHEET:“ModelEarth”andaskstudentstodivideintopairs;anolderstudentwithayoungerstudentworkswell.

10. Explain that the jar is a model of Earth. Explain that all living things on Earth contain water. Water is alsointhesoil(dirt)andintheair.Waterisintheairintheformofclouds.Asrainfallsfromthecloudsorsnowonthegroundmelts,thesoiltakesinsomeofthewater,andplantsinthesoilusethewatertogrow.Animalseattheplantsandalsodrinkwaterfromriversandlakes.

11. Explainthatliquidwaterisnotinallthings.Someitems,suchasrocks,metal,andman-madeitems,suchasplastic,donotcontainliquidwater.

12. AskstudentstofollowtheinstructionsontheSTUDENTINFORMATIONSHEETtobuildtheirmodelEarth.Assistasnecessary.Makesurestudentterrariumsaredonecorrectlyandsetthemunderalamp or near a window.

Day213. DistributetheSTUDENTWORKSHEET:“Water,WaterEverywhere”andinstructstudentstocomplete

theworksheet,individuallyorinpairs,bycirclingthepicturesthatshowanitemthatcontainswater.(NOTE:Youmayalsoaskstudentstocolorjusttheitemsthatcontainwater,orcolorallitems.)

Critical Thinking Concept: Think-Pair-Share Method. As a class, list all the sources of water in the classroom.Remindstudentsthatwatercomesinsolidandliquidform.Remindstudentsthatwaterisintheairandinplantsandanimals.Todemonstrate,completeoneofthefollowingactivities:1)askstudentstoblowonamirror(thecondensationwilldemonstratehowthereiswaterinthebody),or2)direct students to place their hand in a plastic bag and secure it by wrapping tape around the wrist (themoisturethatformsinthebagisfromthestudent’sbody).

Extension Idea:Explaintotheclassthattheaveragepersonuses35gallonsofwaterperday.Askstudentshowtheyusewaterduringtheday,andliststudentresponsesontheboard.Distributeoneplasticbag(labeled“notused”)filledwith35sponges,andoneemptyplasticbag(labeled“used”)toeachstudent.Askstudentstokeeptrackoftheirwaterusebymovingaspongefromthe“notused”bagtothe“used”bageachtimetheyusewateruntilclassthenextday.After24hours,discusswithstudentshowtheyusedwater,howmuchwatertheyused,andhowtheycanconservewater.Makesurestudentsunderstandthatwaterisimportantforhumans(weneedtodrinkwater,brushourteeth,etc.).SincethereisonlysomuchonEarththatisdrinkable,itshouldn’tbewasted.

Answers: PictureswithanS:bike,apple,computer,book,andseaice. PictureswithanL:glassofmilk,river,lake,bottleofcookingoil

ACMP ©2006-2008 UAF Geophysical Institute A-3 Water, Water Everywhere

Model EarthStudent Information Sheet (page 1 of 2)

STEP 1. Place a layer of small rocks in the bottom of a glass jar.

STEP 6. Cover the lid of the jar with plastic wrap, poke a few small holes in the plastic wrap, and set in a sunny location.

STEP 2. Place a layer of sand over the rocks.

STEP 4. Make a small hole in the middle of the soil and place a small plant in the hole.

STEP 3. Fill the jar half full with soil. Wet the soil.

STEP 5. Water thoroughly.

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ACMP ©2006-2008 UAF Geophysical Institute A-4 Water, Water Everywhere

plastic wrap

glass jar

soil

sand

small rocks

plant

Model EarthStudent Information Sheet (page 2 of 2)

ACMP ©2006-2008 UAF Geophysical Institute A-5 Water, Water Everywhere

Directions: Write an S under the pictures of a solid. Write an L un-der the pictures of a liquid.

S or L S or L S or L

S or L S or L S or L

S or L S or L S or L

Water Water EverywhereStudent Worksheet

Name:_______________________

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Level

Solid and LiquidOverhead

ACMP ©2006-2008 UAF Geophysical Institute Water, Water Everywhere

Water / Liquid

Ice / Solid

Water on EarthOverhead

ACMP ©2006-2008 UAF Geophysical Institute Water, Water Everywhere

Liquid Water Solid Water